Averaging time required for measuring the specific absorption rate of a MIMO transmitter
Averaging time required for measuring the specific absorption rate of a MIMO transmitter
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测量 MIMO 发射机比吸收率所需的平均时间
DOI：
10.1109/memc.2014.6798798
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
T. Onishi
中科院分区：
文献类型：
--
作者：
Dinh Thanh Le;T. Iyama;L. Hamada;Soichi Watanabe;T. Onishi
提出了一种测量多输入多输出（MIMO）无线通信发射机中人体暴露电磁场的电场（E-field）的新方法，并对测量过程中所需的平均时间进行了估算。所提出的方法是测量时间平均电场，平均时间是测量系统使平均电场收敛所需的时间。该估计基于对接收信号的幅度的平方或测量的电场强度进行平均。给出并讨论了MIMO无线通信发射机在不同测量参数下的仿真结果。指出多天线发射机的电场测量平均时间比单天线发射机的平均时间长得多。
This paper presents a new method to measure electric field (E-field) for human-body exposure to electromagnetic fields from Multi-Input Multi-Output (MIMO) wireless communication transmitters, and an estimation of averaging time required in the E-field measurement. The proposed method is to measure time-averaged E-field, and the averaging time is the duration required for a measurement system to make averaged E-field converged. The estimation is based on averaging the square of amplitude of received signals or measured E-field strength. Several simulation results with different measurement parameters for MIMO wireless communication transmitters are presented and discussed. It is pointed out that the averaging time in E-field measurements for multi-antenna transmitters is considerably longer than that for single antenna transmitters.